A 70-year-old man was shot in the foot during a robbery outside the Archbishop's Residence in the North Side's Gold Coast neighborhood Friday night, authorities and a relative said.

The man was walking his dog in the 1500 block of North Astor Street, adjacent to the mansion where Cardinal Francis George lives, when someone wearing a mask grabbed him from behind and put a gun to his head about 7:30 p.m. Friday, said a relative who requested anonymity due to safety concerns.

"Give me your [expletive] wallet," the robber said, according to the family member.

When the 70-year-old explained that he doesn't carry a wallet, the assailant fired a shot into his foot, said the relative, who visited the 70-year-old at Northwestern Memorial Hospital after the shooting. The man threw his cell phone and a few bills from a front pocket onto the ground in front of him, and the robber grabbed them and fled.

Hearing a commotion, the doorman of a nearby residence came outside and began to pursue the fleeing assailant down the street, the relative said. The suspect turned and fired shots in the direction of the doorman and 70-year-old, striking a garage but not hitting either man, according to the relative.

Police confirmed that a man was shot during the course of a robbery on the block. The man's condition was stabilized at Northwestern Memorial Hospital, authorities said.